Automatic safety shutter



' @11.131942 E., gswmm; l 23,259,458 'AuToMTIdsAT'sHU'rTgR, y I

"Filed Jan'. 19; 19404,

v Y [Mrk T0/MP0 ,5c-HP, Het? 2.269,4@ AUTOMATIC SAFETY snurfran EdwardH. SchwartnDayton, Ohio Y Appiicaaun January 19, 1940, serial No.. 314,653`

(ci. 2li-4o) 5 Claims.

(Granted under the iml of Marcil s, 1883, as

amended April so, 192s; 37o o.4 G. 757.)

The invention described herein may be manuv -factured and used by or 'for the Government for governmental purposes, without the lpayment to me of any royalty thereon.

This device relates to a sealingI shutter for use in connection with a sealed window in high-altitude aircraft equipped with apparatus l-for maintaining the air in the cabin of the aircraft. at

approximately atmospheric pressure. 1- It is an object of this invention to providei connection with a sealed opening in an inclosure, the interior of which is maintained at a predetermined pressure, an auxiliary sealing means automatically operable upon failure of the primary sealing means.

It is another object of this invention to provide in connection with a pressure-tight compartment having an opening therein and a window for sealingly closing the opening, a shutter normally held in an inoperative position but automatically movable, upon breakage of the window. into opening sealing position.

It is more particularly an object of this invention to provide in connection with a sealed window in aircraft, the interior of which is maintained at a predetermined pressure, anauxiliary sealing member automatically operable, upon breakage of the window, to seal the window open-I ing.

In the drawing:

' Fig. 1 is a vertical sectional view through the inclosure structure, the window,l and the shutter, with the shutter in open position; and

Fig. 2 is a view similar to Fig. 1, with the shut-v ter in closed` operative position.

Referring to the drawing:

I is a part of an inclosure structure. such as cabininclosure means, for covering1 an airplane equipped for traveling in regions of rareied atmosphere by having associated therewith suitable mechanism (not shown) for maintaining the air in the cabin at a predetermined pressure approximating normal suitably connected -to the inc losure or cabin structure is a window frame 2 for supporting window glass 3. Angle member 4 holds the glass in position in the frame against sealing member 5. suitably connected "to the window frame is a bracket mernler S having integral therewith a shaft l upon which is pivotaly mounted a hanger `8, carrying shutter 9. The hanger 8 is provided with an enlarged shaft engaging bearing portion IB, permitting longitudinal `sliding movement of the samer with respect to the einem. Torsion spring hl, having an extending portion Il bearing against hanger 8, and g second cate-,riding portion" l2 bearing against bracket 6, urges shutter 9 in a clockwise direction into closed position. The shutter is provided with a socket member I3 for receiving one end of rod i4, the other end of which rests against the window glass 3 for the purpose of .holding the shutter in open inoperative position. Upon breakage of the windowl glass, shutter 9 moves under the action of spring l0 to closed position against sealing member I5. Sealing member l5 also serves as a buffer. The difference in pressure between the inside and the outside of the cabin maintains the shutter in 4 closed sealing position against member l5. En-

larged bearing portion l5 permits relative slidingmovement between the shutter and the sealing member, insuring a uniformly tight seal.

It is obvious that various changes may be made in the device without departing from the spirit of the invention, it being intended to be limited only by the appended claims.

I claim:

1. A sealing shutter for use in connection with a window in a structure, the atmosphere of which ls maintained at a predetermined pressure, comprising means for attaching said shutter to said structure, means for urging said shutter into a closed position, and means carried by said shuttezend engaging the transparent portion of said window to hold said shutter in open position, whereby, upon breakage of v'the transparent portion of said window, said auxiliary window is moved into closed position.

window of a vehicle cabin, the interior atmosphere of which is maintained at a predetermined .pressure comprising means for attaching said atmospheric conditions.

shutter to said cabin, means for urgingsaid shutter into window closing position, and means carried by said shutter and engaging a transparent portion of said window for holding said shutter in an open position, whereby, upon breakv age of said transparent,A portion, said closing 'means urges lsaidshutter into closed sealed pesition.

N21"A -I n 2,269,488'" 4. In a substantially pressure-tight nclosure v structure having an opening therein, a window sealing said openingfa shutter pivotally mounted on said struct-ure adjacent said opening,V and means engaging both saidwindow' and shutter f and directly responsive to breakage of said win- 5. In a substantially pressure-tight inclosure member having an opening therein, a. Window sealing saidl opening; a shutter; bearingmeans dow for moving said shutter into openingsealing l 'for pivot-ally 'mountingsaid shutter adjacentsaid onening-and uponthe higherpressure side of said member, said bearmg means comprising a hanger.`

and a loosely tting bearing pin; andA means diin closed sevaledposition. 

